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Answered 2011-01-22 07:48:44

Area of a circle = 3.14 * r2

Thus, radius, r = root of ( Area of a circle / 3.14 ) --------- equation 1

Circumference of circle = 2 * 3.14 * r

Therefore, from (equation 1), Circumference = 2 * 3.14 * root of ( Area of a circle / 3.14 ).

In a nutshell, first find the radius and then the circumference.

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